So has anyone tried this yet ?????
http://www.zdnet.com/article/encrypted-email-service-protonmail-comes-out-of-beta-unveils-ios-and-android-apps/
https://protonmail.com/security-details
ProtonMail Plans Explained (Free, Paid, Visionary)
https://protonmail.com/support/knowledge-base/email-ddos-protection/
Seems to be still under very active development but reading through a lot if the comments it looks to be at a pretty stable and usable state. Makes sense as they have opened it up for anyone to join as opposed to the invite only service they were offering.
I like that it is not USA or UK/EU controlled in any way meaning private stays private.

Gmail goes HTTPS-only, inside and out! - Graham Cluley
This is great news! Must read.
HTTPS is always on and can't be turned off now. That's great but that's not the best part.
Interesting graphic too...